prologue; a phone call
You could only mentally curse at him, not wanting to make a louder noise than the cheesy song you chose as his ringtone. And knowing him, he wouldn't stop calling till you picked up, asshole. "Denks, what do you want?" You mumbled, laying back down as you heard his shaky breath on the other end.
"Y/n, please," he whined, catching your attention quickly. Did he hurt himself or get caught by Aizawa again? His fault for having another late night snack run. "You gotta do me a favor!"
Well there was the first red flag; him asking for stuff. Sure, it was usually something like going out for a snack run but he wouldn't call you after going out-solo missions weren't his thing. They weren't any bodies thing when it came to a teacher or another student finding out about it.
"Look, Denki, it's..." You trailed off, moving your phone away from your ear to check the time. "almost 2 am and i don't wanna get myself into a mess, so please let me sleep," if your begging wasn't enough for him to give in then you didn't know what would. "I'll even do the favor in the morning as an 'im sorry I'm too tired to do shit'"
Denki chuckled and without even seeing him you could tell there was some smug smile on his face. "Oh, pretty little y/n, I bet you don't even know what I'm gonna ask for! It'll benefit both of us."
Something like this would've sparked your curiosity, but not now. Not this early. "Don't know, don't care, don't call again," you rushed, finally pressing the red icon to hang up. But surprise surprise, the music came back. Why would he listen to your pleas and bargaining? They never work.
You reject his call and attempt to fall back into the slumbering form you once took; forgetting the stubborn shit that was denki, never giving up till he was satisfied. Your phone buzzed a few times, showing more of Denki's attempts to get you to answer.
Eventually, after a few more minutes of buzzing and spam calls you've grown more and more annoyed. "Mother fucker," you mumbled, harshly tapping the contact name on your screen.
Denki picked up right away, "hello~?" he sang happily. Oh, this bitch. "Come crawling back to me I see."
"Shut up, I'm so tired of you pulling shit like this. I don't wanna hear what you have to say or what you wanna ask me, I'm done, denki." You ranted, the anger that built up from seconds ago finally hitting him like a wave.
You heard him shuffle around then a soft curse came out, sparking your curiosity. "Y/n, when's the last time I ever asked you for something? Huh?"
"Yesterday when you asked me for some ketchup for your soggy ass fries."
"That-THAT DOESN'T COUNT OK?"
"Well, it should, but what's that have to do with anything?" You stared up at the ceiling, listening to your friend since elementary mumble on and off about something you couldn't quite make out. "Words Denki, use one's I can understand," you teased.
He sounded breathless, voice shaky and strained; you've heard him when he's about to pass out and it wasn't like this. At all. "Denki?"
"Y/n, can you..." he swallowed, "c-can you help me, please, before I ask someone else." He changed the tone, this time it was soft and submissive like.
"Then go ask someone else."
"But then it wouldn't be as special-it's a best friend thing, y'know?"
Special? The hell did he mean by special? You rolled your eyes, not wanting to spend more time than you already had in your head. It had to be something perverted, come on, it was denki after all.
You sighed, "all right, I'll do you the favor BUT you have to do me one just as big. No questions asked."
"No questions asked," he repeated slowly as if he was trying to read between imaginary lines. "Deal, now, touch yourself for me y/n."
Okay that was a little...fast. You did as you were told, slipping your hand down into your pajama bottoms and panties. A small shock of pure bliss shot through you as your fingers danced against the sensitive nerve. Light, airy moans leaving your mouth as you started working up your pace.
"Denki," you purred, saying his name felt so natural, so right. The soft pants on the other line were enough for you to keep going. Calling his name out each time he called out yours, back and forth till one of you decided to become silent.
"Y/n, I bet you look so pretty right now," he groaned, "touching yourself and thinking about me railing you, huh? Does that pretty pussy need me?"
His words fed into your lust, one by one slowly leading you more and more to the edge of ecstasy. The thoughts didn't even occur to you until he mentioned it. Your hips moved more as you closed your eyes; letting your imagination do most of the work.
"F-fuck, y/n, I'm so close," he warned causing you to start watching your pace more. Following his lead as the two of you returned to the praising and meaningless comments.
"Denki, I'm coming, plea-" before you could finish it finally hit you. With a silent scream and an arch of your back, the wave pleasure had come to an end. Denki followed right behind, gasping lightly and holding onto the phone tighter. You could hear his small whine as he calmed down.
"Shit," he breathed out, "that was great, almost thought you were gonna fake out on me halfway."
You gave him a soft laugh, "yeah, yeah, as much as I hate to admit...it wouldn't be as special." He ignored your mockery, too lost in awe to process anything but what the last minutes held.
The blond took in a quick breath, "do you think we could do this again?"
Oh god. "No, absolutely not."
"Come on, we're leveling up! From friends to fuck buddies!"
"You say that like it's a good thing," you mumbled, drawing your free arm back up to the surface and letting it fall back to where your head laid.
Denki let out a tsk while he fumbled with who knows what; the sounds of his blanket moving forced your mind back into the gutter. You shook your head and tried to keep calm, come on you just had your moment a while ago anyway.
"It is, we're both single, lonely and as much as I love watching porn, I get a little bored of it." Well, atleast he was being honest. "And you're a virgin, I'm sure you'd love this great learning experience."
You scoffed at his comment, "right, well we'll see about it, ok?"
"Okay, goodnight y/n."
"Goodnight, denki." You hung up the phone, placing it back where it originally was on the stand. Tonight was the night it'd all change, for better or for worse now that you're fucking your best friend.